Ore-feeder.



l N0.8-5s,346. I PATENTED MAY14Y,1907.'

H. BGGBRS.

ORE FEEDER. I

APPLICATION FILED APRA-0,1906. Y

Ai.A

PATENTED MAY14, 1907.

N0. a53,346. A

H; EGGEES.

OEE FEEDER.

APPLICATION FILED APR. l0, 1906.

3 SHEETS-SHEET l2.

PAEL'BNEED MAY 14, 1907.

H; EGGERS yORF FEEDER.v APPLIGATION FILED APB. 10, 190B.

a BHEBTSTSHEBT a.

nl: Naxms'psrsies co.. wAsnmm-QN, n. c.,

of the ore being omitted.

. operating the same.

proved ore feeder.

HENRY EGGEES, OF DENVER, COLORADO.

oRE-FEEDH.

Specification of Letters Patent.

Patented May 14, 190'?.

Applicaticniiled April 10, 1906. Serial No. 310,956.

To L7/Z wir/0in t nutty concern:

Be it known that I, HENRY Eeens, a citizen of the United States ofAmerica, residing atthe city and county of Denver and State of Colorado,have invented a new and useful Ore-Feeder, of which the following is aspeciication.

My invention relates to improvements in ore feeders, and the object ofmy invention is'. to provide a frictional grip ore feeder for feedinglump ore from rock breakers to stamp mills, granulators, andpulve'rizing machines, in concentrating and other ore treating mills. Iattain this object by the mechanism illustrated in the accompanyingdrawings, in which:

Figure 1, is a side elevation'of my improved ore feeder arranged to beoperated by the tappet of a stamp mill. Fig 2, is a front view thereof,the gate for regulating the feed Fig. 3, is a horizontal section on theline 3-3 of Fig. 1. Fig. 4, is a side elevation of the feeder arrangedto be operated by a cam. Fig. 5, is a perspective view of one of theroller boxes. Fig. 6, is a vertical, sectional view through a portion ofthe friction disk, and mechanism for Fig. 7, is a sectional view on theline 77 of Fig. 6. And Figs. 8 and 9, are views illustrating a gate forregulating the feed of the ore.

Similar letters of reference refer to similar parts throughout theseveral views.

Referring to the drawings, the numeral 1, in general, designates theframe of my im- This frame is preferably composed of vertically andhorizontally arranged angle irons 2 and 3, and the lower portion of theframe is provided with rollers 4, by which it may be easily moved. `Avertical shaft 4^, is journaled in boxes 5 and 5^, which are secured tothe cross pieces 6 and 7, of the front end of the machine. This shaft isplaced at a slightly forward angle to the vertical corner posts 2, ofthe frame, and two disks 9 and 10, are secured to it. These disks areplaced at a short distance apart. The upper disk 9, is made of adiameter that will ill but rotate within the front corner standards 2,and a hopper 11, is mounted. in the top of the frame, the bottom ofwhich slopes from the rear end of the frame toward the front end of theframe, and terminates in a flat discharge spout outlet 12, the bottom ofwhich rests close to the top surface of the feed disk 9. This hopper ispreferably made in two parts, the hopper proper 11, and its dischargeoutlet 12. The hopper is preferablyconstructed of sheet iron, but itsdischarge outlet is preferably a casting. The hopper rests on thetopcross pieces 3, of the frame, and the discharge spout is secured atits front end to the cross piece, and a bolt 13, extends from its rearend to the upper rear cross piece, and is bolted to it, and as the faceof the disk is inclined or sloped outward and downward from the frame,the bottom of the discharge spout is also beveled to fit all aroundalmost in contact with it. The front end of this discharge spout as wellas its bottom, is open, and on the opposite sides of its open end guideplates 14 and 15, are placed. ser

The guide plate feeder 14, is secured to the discharge chute 12. Thisguide plate is curved to direct the discharging ore to the centralportion of the feed disk. The guide platel, is secured at its rear endto the discharge chute, and is braced against rotative feed mo vement ofthe feed disk by a hook 1 6, which is pivotally secured to the adjacentend standard of the frame at one end, and hooks into an eye 17, securedto the back of the guide plate. This plate is also curved to guide theore to the central ortion of the discharging edge of the feed dis r. Thelower disk 10, is the frictional feed disk. It is preferably madesomewhat smaller in diameter than the feed disk 9, and to one side edgeof it I attach a step by step frictional grip device, which in eneral Iwill designate by the numeral 18, ut which is composed of two similarhalf boxes 19 and 20, each of Which is provided with an arm 2l, thatextends to and is loosely journaled to the shaft 4^, on opposite sidesof the disk 10, by means of journal boxes 21A. These boxes 19 and 20,are made to receive tWo rollers 22 and 23, which are provided with.trunnions that are journaled and rotatably mounted in the ends of theboxes, the rollers being positioned to extend below the bottom of theboxes. A projection 24, extends from each, end of the ox beyond therollers, forming a guideway space between them adjacent to the rollers,in each box. In this space a tapering hollow casing 24^, extends looselyand slidably with its closed portion in bearing contact and rollingrelation to the rollers. These hollow casings are provided withrectangular recesses 25, in which a tapering rectangular IFS Irio

block of wood or of any other suitable material or metal 26, is fittedand arranged so that its lower surface will extend below the casing andbear on the surface of the disk. These boxes and casings are arranged tostand and register opposite each other on the opposite sides of theupper and lower surfaces of the disk close to the disks outer edge. Inthe Youter ends of the boxes, angle-sha ed projecting lugs 26 and 27,are formed, tiat extend toward each otherand form together an aperturedlug, through which one end of a lever 28, extends loosely, and is boltedloosely to the lug bya bolt 28A, which passes loosely through the lugsand the lever. The adjacent end of the lever 28, is ivotally connectedto the end of one arm o a crank lever 29, the o posite arm of which isjournaled horizonta ly along the to of the frame l, in boxes 30, thecaps 30^ o which are secured against accidental displacement by athreaded screw 30, which projects through a lug 30C against the caa'check nut 30D being provided to lock tie bolt against displacement. Tothe opposite end portion of this arm I secure one end of an arm 3l whichprojects from and normally stands at rightA angles to the frame of thefeeder. The free end of this arm 31, is adapted to be struckyintermittently by the tappet of a stamp mill,

as will be explained hereinafter. The thickest end of the wedge casingsextends toward the rear end of the machine, and lugs 32, are formed onthem, that project toward the boxes 19 and 20, and through these lugs Iform a ertures 33, through which I extend looselylbolts 34, one end ofwhich is threaded into the adjacent sides of the boxes the oposite endsof these bolts project beyond the lhgs and nuts .35, are threaded tothem, and on them between the nut and the lugs springs 36, are 'mounted,which are normally held under expansive pressure enough to normally holdthe wedges under pressure contact with the rollers, and consequently thewooden frictional surfaces in contact with the opposite sides of thedisk, and the frictional pressure of the wedges, may be increased or'diminished as desired, by adjusting the nuts a block 37, secured to theadjacent corner 2, of the frame, and its end is threaded, and a nut 38is threaded to it. This nut is referably provided with a handle 38A, ont e free end of which a weight 38B is formed, and intermediate of thisnut and the frictional grip device of the disk, I secure a collar on therod, and between this collar and the nut I mount on the rod an expansivespring 39,

5 which is held under adjustable tension by the nut. This spring is madestronger or of greater resilient. tension than the s rings 3G, so thatwhen the arm 29 and ref been thrown back by a 4blow from the tappet Theopposite end of the rod 28, ex. tends'loosely through an aperture formedinV 28 have4 on the arm 3l, the said spring will throw the rod 28,forward again to its normal position, thus freeing the wedge plates,which will then be drawn forward beneath the rollers by their springs36.

The operation is as follows: The feeder is positioned back of a stampmill in position to feed ore to it, and it is arranged so that thetappet of the stamp mill will strike arm 3l at each of its verticalstrokes, and the hopper is kept well supplied with ore. The stroke of astamp mill tappet is a vertical stroke of a 'ixed distance, although itvaries in the number of strokes per minute, depending on the characterof ore being stamped. rl`he length of the stroke imparted to the end ofthe arm may be regulated by screwing the nut 38, either on or off of therod 28, which will either raise or lower the free 'end of the arm towardor from the tappet, and thus regulate the length of the stroke. Theblows of the tappet on the end of the arm and the length of the strokeof the free end of thearm, are what governs the feed of the disk and ofthe ore out of the hopper into the feed plate disk, and this tappetstroke is imparted to the rollers and wedges to feed the disk step bystep in the following manner: When the tappet strikes the free end ofthe arm, it throws it down, which jerks the rod 28 back against itssprin 39, and as this rod is bolted to both of the ro ler boxes, and asthe rollers are held normally in contact with the wedges by the springs36, the rollers are thrown violently against the surface of the wedgesand they are pressed tightly against the opposite sid es of thefrictional feed disk, instantly clamping it tightly between them, and,at the very start of the backward movement, and throwing the wedges andconsequently the feed disk and the ore feeding plate around a distanceequal to thev downward stroke of the arm, and the throw of the rod 28,which par- ,tial rotative movement feeds the ore out of the dischargechute of the hopperonto the plate disk between the guide plates, which,as the feed plate is rotated step by step, feeds the ore down itssloping surface between the guide plates to its edge, and discharges itinto the mortar of the ore stamp. The instant the tappet strikes thefree end-of the arm, the rollers move up tight against the wedges, and

they instantly grip and move the disk around the amount of their throw,but as this-sudden backward jerk of the rod compresses the spring 39,the instant it is over the spring throws the rod forward, and the freeend of the arm up, causing it to follow the tappet up on its up stroke.This forward throw of the rod also throws the rollers and their boxesforward, and as the springs 35 are made weaker than the spring 39, theyyield under the forward jerk of the rod and rollers, while the wedgesremain stationary for an instant, thus loosening the rollers from them,but the 'IOO IIO

ISO

b y step feed movement of the ore 'feeding` disk, is repeated at fromabout twenty to ab out sixty strokes per minute, depending on thenumbenof drops of the stamp per minute.

Upon the front of the hopper, is secured a gate 40, which can be raisedor lowered to regulate the discharge of the ore from the disk 9. Thegate is held in position by pins or screws 41.

In Fig. 4, I illustrate a modification of the mechanism for operatingthe frictional grip device. In this modification I operate the feeder bybelt instead of by the tappet of a stamp mill, and to this end I journala shaft 43, in boxes 44, which are secured to the bottom cross pieces 3.One end of this shaft projects beyond the feeder, and a belt pulley 45,is secured on it. A cam 46, is also mounted on the shaft, below the rod28, and on the rod 28 I secure a collar 47, and to this collar Ipivotally secure a lever 48, intermediate of its ends. The'upper end ofthe lever extends to and is pivotally secured to a side piece of theframe, and its lower end is free and is arranged to engage the face ofthe cam, and is held normally in engagement therewith by the spring 39.When a power operating belt is attached to the pulley and the shaft andcam are rotated, the cam pushes the lever and consequently the rod backagainst the spring, and the spring moves the lever and rod forward; thusan intermittent reciprocal movement is imparted to the rod 28, which inthe tappet operating mechanism is imparted to the yfrictional gripdevice, and to its disk and the ore feeding disk. v

I-Iaving described my invention, what I claim as new and desire tosecure by Letters Patent, is:

l. In an ore feeder, the combination of the frame, provided with floorrollers and an inclined vertical shaft at one end, with an ore feedingdisk secured to said shaft, an ore hopper in said frame, having itsdischarge aperture resting close onto said disk and arranged todischarge thereon, ore guards varranged to guide the ore from saiddischarge aperture to the discharge edge of said ore feeding disk, africtional disk secured to said shaft, a pair of roller supporting armspivotally mounted on said shaft on opposite sides of said disk, a wedgebetween each roller and said frictional disk, and arranged to have aslight reciprocal movement of said rollers, resilient means for normallyholding said rollers in engagement with said wedges, a reciprocating rodspring controlled in one direction of its movement, connected to saidroller supporting arms, and means for moving said rod in the oppositedipecdtion of its reciprocal movement, as speciie 2. In an ore feeder,the combination with the frame, the inclined shaft journaled in saidframe, the ore feeding disk secured on said shaft, the hopper arrangedin said frame to discharge on said ore feeding disk, and the guideplates arranged to guide ore from said hopper to the discharge edge ofsaid disk, of the frictional disk secured to said shaft, a pair of boxespivotally secured to said shaft, on opposite sides of said frictionaldisk, rollers pivotally mounted in said boxes to project from the same,a guideway in each box adjacent to its roller, a wedge in each of saidguideways, a rod secured to said boxes and extending loosely throughsaid wedges, a spring pressure between the end of said rod and saidwedges, a reciprocating rod spring controlled in one direction ofitsmovement, connected to said boxes, and means for imparting anoperative movement to said rod Brissm THOMPSON.

